CAJ | 학술논문

传感器技术是大数据技术在电力系统应用的基础，而现有光学电流传感器(optical current sensor，OCS)基于马吕斯定律采用光强检测模式实现对法拉第旋转角的测量，导致非线性测量、动态范围小、易受线双折射和温度影响等问题。该文提出一种用晶体劈将法拉第旋转角转换为条纹的位移，并通过数字图像采集单元测量位移量，实现法拉第旋转角大范围线性测量的OCS设计方法。实验结果表明，相比传统光强检测模式，采用成像测量模式可使OCS具有光功率无关性、动态测量范围大、线性测量等优点，同时降低了温度对测量结果的影响。
전감기기술시대수거기술재전력계통응용적기출，이현유광학전류전감기(optical current sensor，OCS)기우마려사정률채용광강검측모식실현대법랍제선전각적측량，도치비선성측량、동태범위소、역수선쌍절사화온도영향등문제。해문제출일충용정체벽장법랍제선전각전환위조문적위이，병통과수자도상채집단원측량위이량，실현법랍제선전각대범위선성측량적OCS설계방법。실험결과표명，상비전통광강검측모식，채용성상측량모식가사OCS구유광공솔무관성、동태측량범위대、선성측량등우점，동시강저료온도대측량결과적영향。
Sensor technology is the foundation of big data applications in power system. The existing optical current sensor (OCS) based on Malus law and its light intensity detection mode has some defects of small dynamic measurement range, big temperature drift and linear birefringence. In this paper, a new type of OCS which can achieve linear measurements of a wide range Faraday rotation angle was presented. It used crystal wedge to convert Faraday rotation angle to displacement of light lines, image acquisition system captured the spot, and calculate the displacement. Compared with light intensity detection mode, the experimental results show that imaging mode enables OCS with optical power independent, large dynamic range and linearity measurements. Temperature drift on the measurement results is also reduced.